> Thanks Martijn.
> Unfortunatelly, I don't have a chance to use triggers.

You create the database, right? So why can't you create triggers?

Martijn Tonies
Database Workbench - tool for InterBase, Firebird, MySQL, NexusDB, Oracle &
MS SQL Server
Upscene Productions
http://www.upscene.com
My thoughts:
http://blog.upscene.com/martijn/
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> If you don't want your users to update/insert/delete data,
> why not simply create a set of triggers on each table that
> prohibits this?